Threaded-jar closure.



C. HAMMER.

THHEADED JAR CLOSURE.

APPLICATION FILED APR.25. |911.

hmmm@ mmm May 28,1918.

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Charles Hammer:

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CHARLES HAMMER, 0F QUEENS, vNEW' YORK, ASSGN'OR, BY JDTRECT AND MESNEMSSTGE'MENTS, T0 AMERICAN METAL CAP C0., OF BROOKLYN, NEW YORK.

THE'EDED-J'AEG CLOSUE/E.

nae'aeea.

To all whom t may concern."

Be it known that l, CHARLES HAMMER, a citizen of the United States,residing at Queens, in the county'of Queens and State of New York, haveinvented certain new and useful llmprovements in Threaded-Jar Closures,of which the following is a specication. l

This invention relates to bottle closures of the kind made from a stripof metal bent to the form oit a cylinder or tube and having a disksecured to one end to close the same; which is provided with a helicalcorrugation to :form a screw thread, to permit the closure to be screwedon a threaded bottle top.

The object of this invention is to provide an improved form of lap forthe cylindrical member, whereby the raw edge of the end portion of theblank is concealed, and the lapping portions held in proper position,

, without the interlocking seam that is usually lte provided with suchconstruction. Such interlocking seam will form four lapping thicknessesand cause considerable of a bulge that tends to interfere with thecorrugated portions, and also provides ridges or channels tending toreceive and hold ymaterial with which the bottlel is filled.

A further object of the invention,. is to provide integral means in thelapping portions where the screw thread or corrugation is located, thatwill serve to .interlock these portions together, and prevent lateraldisplacement. y

lln the accompanying drawing showing embodiments of my invention, Figure1 shows the blank for the cylindrical part. lliig. `2 shows the middlelongitudinal section through the blank with the end portions doubledback on the blank.` Eig. 3 shows the completed cap. Fig. l is atransverse section on the line 4--4 of Eig. 3. Fig. 5 is a partialtransverse section enlarged through the corrugation. Fig. 6 showsl theblank of a modication. liig. 7 isv a longitudinal section of the latter.Fig. 8 is a partial vertical section enlarged at the lower end showingthe lap joint. Eig. 9 is a partial view showing a modification of thecorrugation.

As shown in the 'drawing l provide a blank in the form of a strip 10 ofsubstantially longitudinal form. The end portions are doubled back onthe blank to lie Hat against Specilcation of Letters Patent.

application led April 25, 191'?.

Patented May 2d, TETE.,

Serial No. lt.

the same as shown at 11 and 12 in Fig. 2'.

This blank is bent to the form of a cylinder as indicated in Fig. 4g,and the doubled ends are caused to lap a suiiicient distance so thateach doubled portion extends beyond the other, to bring the edges 13 and14 intocontact, as shown. This will cause the inner face of the outerdoubled portion 13 to lie against the other end portion beyond thedoubled portion; and will also cause the outer face of the doubledportion 12 to lie against the inner wall of the other doubled portionbeyond the bent portion. One end of the cylinder or tube is closed by adisk 15 that is suitably secured to the longitudinal edge of the blank,that is preferably edected by the usual interlocking joint. This will befacilitated by providing notches 16, 17, 18 and 19, so that the doubledportions 12 and 13 will not be included in the portion that interlockswith the disk 15; and the lower or open end of the cylinder will notinclude the lapping portions.

Suitable interlocking means are provided at the lower open end in thepresent instance the lower margin is doubled back outwardly as shown at20. This doubled portion includes the lapping portion below the doubledportions 12 and 13, as indicated in the section of Fig. 8. This willserve to assist in holding the lapping portions together, as thecontiguous raw edges of the doubled portions are brought together andwill prevent lateral displacement tending to spread the cylinder. vButit will be seen that these edges 13 and 14 are merely brought togetherin contact and do not lap or interlock vas is usual with suchconstruction.

At the lower portionof the cylindrical part the body is given a helicalcorrugation to provide a screw thread, as indicated at 21. This is doneby suitable dies so that the cap can be secured on a screw threaded'bottle.

Means are further provided for interlocking the lapping portions at thescrew thread 21 that are integral with the metal at such portions. Thisis-done by means -ot indentations or lugs 22 formed by pressingoutwardly the metal bv suitable dies. lt will be seen from the sectionshown in Fig. 5 that the lugs on the inner lapping portion extend intothe lugs of the outer lapping portion, serving vto prevent lateraldisplacey ment of the lapping portion-s. In Fig. 3

these indentations are shown as located only ,at the middle or highestportion of each thread, but they may extend throughout the hreadstransversely thereto as indicated in In Figs. 6 and 7 is shown amodified form of blank, in which the strip 23 has two projectingportions 24 and 25, in one end, while the other end is provided with thenotches 26 and 27. The projections 24 and 25 are doubled back'on theblank, and also the portion 28 between the said notches, as indicated inFig. 7. Otherwise, the formation ofthe closure is the same as that shownin' Figs. 3 and 4. V

Having thus described my invention, what I claim is p 1. A closure capcomprising a body portion formed of a metal strip bent into theproximate form ofa cylinder with the strip end portions lapping, theinner edge being doubled back on itself outwardly, and the outer lappingedge of the strip being doubled back on itself inwardly, with the edgesof the two bent ends in contact without lapping, the outer face of theinner doubled portion lying against the inner wall of the o uter lappingend beyond its doubled portion, and the inner face of the outer doubledportion lying against the outer wall of the inner lapping portion beyondthe doubled portion, an end member closing one end of the cylinder andsecured thereto, and means for securing the lapping portions at the openend of the closure.

2. A closure cap comprising a body portion formed of a metal strip bentinto the proximate vform of a cylinder with the strip end portionslapping, the inner edge being doubled back on itself outwardly, and theouter lapping edge of the strip being doubled back-on itself inwardly,with the edges of the two bent ends in contact without lapping, theouter faCe of the inner doubled portion lying against the inner wall ofthe o uter lapping end beyond its doubled portion, and the inner face`of the outer doubled portion lying against the outer wall of the innerlapping portion beyond the. doubled portion, an end'inember `closing oneend of the cylinder and secured thereto, and means for securing thelapping portions at the open end of the closure, the body being providedwith a. helical corrugation at the lower end portion that includes saidlapping portions.

3. A closurec'ap comprising a body portion formed of a metal strip bentinto the proximate form of a cylinder with the strip end portionslapping, the inner edge being doubled back on itself outwardly, and theouter lapping edge of the strip being doubled back on itself inwardly,with the edges of the two bent ends in contact without lapping, theouter face of the inner doubled portion lying against the inner Wall ofthe outer lapping end beyond its doubled portion, and the inner face ofthe outer doubled portion lying against the outer wall of the innerlapping portion beyond the doubled portion, the body having the lowermargin bent back on itself which includes the lapping portions.

4. A closure cap Comprising a body portion formed of a metal strip bentinto the proximate form of a cylinder with the strip end portionslapping, the inner edge being doubled back on itself outwardly, and theouter lappin edge of the strip being doubled back on itse f inwardly,with the edges of the two bent ends in contact without lapping, theouter face of the inner doubled portion lying against the inner wall ofthe outer lappin end beyond its doubled ortion, and the inner face ofthe outer dou led portion lying against the outer wall of the innerlapping portion beyond the doubled portion, the body having the lowermargin bent back on itself which includes the lapping portions but notthe lapping portions that are doubled back.

5. A closure cap comprising a body portion formed of a metal strip bentinto the proximate form of a cylinder with the strip end portionslapping, the inner edge being doubled back on itself outwardly, and theouter lapping edge of the strip being doubled back on itself inwardly,with the edges of the two bent ends in contact without lapping, theouter face of the inner doubled portion lying against the inner wall ofthe outer lapping end beyond its doubled portion, and the inner face ofthe outer doubled portion lying against the outer wall of the innerlapping portion beyond the doubled portion, an end member closing oneend of the cylinder secured thereto, and means for securing the lappingportions at the open end curing the lapping portions at the open end ofthe closure, the body being provided with a helical corrugation at thelower end portion that includes said lapping portions, the lappingcorrugated portions being provided with indentations that interlock toprevent lateral displacement of the lapping portions.

6. A closure cap comprising a body portion formed of a metal strip bentinto the proximate form of a cylinder with the strip end portionslapping, the inner edge being doubled back on itself outwardly, and theouter lapping edge of the strip being doubled back on itself inwardly,with the edges of the two bent ends in contact without lapping, theouter face of the inner doubled portion lying against the inner wall ofthe outer lapping end beyond its doubled portion, and the -inner face ofthe outer" doubled portion lying against the outer wall of the innerlapping portion beyond the doubled portion, an end member closing oneend of algemene l the cylinder secured thereto, and means for securingthe lapping portions at the open end of the closure, the body beingprovided with a helical corrugation at the lower end portion thatincludes said lapping portions, the corrugations at the lapping portionsbeing provided with longitudinally .extending ribs in the form ofoutwardly proj ectin indentations that interlock to prevent latera 10displacement.

7, A closure cap comprising a hody portions, the oorrugations at thelapping portions heing provided With longitudinally extending ribs inthe form of outwardly projecting indentations that interlock to pre- 2ovent lateral displacement.

cuantas iraniana with a helical corrugation at the lower i5 end portionthat includes said lapping por-

